/Engine/Source/Runtime/Core/Public/Math/BasicMathExpressionEvaluator.h
Consume a symbol from the specified consumer's stream, if one exists at the current read position
namespace ExpressionParser { template<typename TSymbol> [TOptional](API\Runtime\Core\IO\TOptional)< [FExpressionError](API\Runtime\Core\Misc\FExpressionError) > ExpressionParser::ConsumeSymbol ( FExpressionTokenConsumer & Consumer ) }